<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img id="img" src="../assets/jpr.jpg" alt=""/>
        <span>电商后台管理系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主题区 -->
    <el-container>
        <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px' ">
           <div class="toggle-button" @click="toggleCollapes">|||</div>
          <!-- 侧边栏导航区 -->
      <el-menu :unique-opened="true" background-color="#313743" 
      text-color="#fff" active-text-color="#3899ff" :collapse="isCollapse"
       :collapse-transition="false" :router="true" :default-active="activePath">
       <!-- 一级菜单 -->
      <el-submenu :index="item.id+ ''" v-for ="item in menulist" :key="item.id">
          <!-- 一级菜单的模板区 -->
        <template slot="title">
            <!-- 图标 -->
          <i :class="iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
         <!-- 二级菜单 -->
        <el-menu-item :index=" '/'+submenu.path+''" 
        v-for="submenu in item.children" :key="submenu.id" 
        @click="saveNavState('/'+submenu.path+'')">
             <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{submenu.authName}}</span>
        </el-menu-item>
      </el-submenu>
    </el-menu>
      </el-aside>
      <!-- 右侧内容主体 -->
      <el-main>
          <!-- 路由占位符 -->
          <router-view></router-view>
      </el-main>
    </el-container>
  </el-container>
</template>

<script>
export default {
    data(){
      return {
          //左侧菜单数据
          menulist:[],
          iconsObj:{
              125:'iconfont icon-user',
              103:'iconfont icon-tijikongjian',
              101:'iconfont icon-shangpin',
              102:'iconfont icon-danju',
              145:'iconfont icon-baobiao'
          },
          //是否折叠
          isCollapse:false,
          //被激活的链接地址
          activePath:''
      }
    },
  created() {
      this.getMenuList()
      this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },
    //获取所有的菜单
    async getMenuList(){
     const {data:res}  =await this.$http.get('menus')
     if(res.meta.status != 200)return this.$message.error(res.meta.msg)
     this.menulist = res.data
     console.log(res);
    },
    //点击按钮 切换菜单的折叠和展开
    toggleCollapes(){
     this.isCollapse =! this.isCollapse
    },
    //保存链接的激活状态
    saveNavState(activePath){
    window.sessionStorage.setItem('activePath',activePath)
    this.activePath = activePath
    }
  },
}
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  padding-left: 0;
  background-color: #363c42;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div{
    display: flex;
    align-items:center;
    span {
        margin-left:15px ;
    }
  }
}
.el-aside {
  background-color: #313743;
  .el-menu {
      border-right:none ;
  }
}
.el-main {
  background-color: #e9edf1;
}
.iconfont{
    margin-right:10px ;
}
.toggle-button{
    background-color: #495065;
    font-size:10px ;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2;
    cursor: pointer;
}
#img{
  margin-left: 20px;
  width: 58px;
  height: 58px;
  border-radius: 100%;
}
</style>